:root {
  --paper: #f0eee8;
  --panel: #faf9f5;
  --ink: #161817;
  --muted: #73746e;
  --line: #d4d1c8;
  --accent: #ef5b2a;
  --green: #a5bf43;
  --blue: #4d98b3;
  --yellow: #d8a72d;
  --violet: #8772ad;
  --topbar: rgba(250,249,245,.94);
  --rail: #dedbd2;
  --rail-line: #c9c5bb;
  --field: #fff;
  --canvas: #edebe4;
  --canvas-grid: #d1cec6;
  --debug-bg: #171918;
  --debug-text: #d6d8d3;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

:root[data-theme="dark"] {
  --paper: #111312;
  --panel: #1b1e1c;
  --ink: #f1f0ea;
  --muted: #9b9d96;
  --line: #343834;
  --accent: #ff6a38;
  --topbar: rgba(24,27,25,.94);
  --rail: #252925;
  --rail-line: #393d39;
  --field: #242824;
  --canvas: #151816;
  --canvas-grid: #303530;
  --debug-bg: #0b0d0c;
  --debug-text: #dde0da;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: var(--paper); }
button, input, select { font: inherit; }
button { cursor: pointer; }

.topbar {
  height: 82px; padding: 0 28px; display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center; border-bottom: 1px solid var(--line); background: var(--topbar);
  position: sticky; top: 0; z-index: 20; backdrop-filter: blur(14px);
}
.brand { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 12px; width: max-content; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; color: white; background: var(--ink); font-weight: 900; letter-spacing: -2px; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 15px; letter-spacing: .11em; }
.brand small { font-size: 8px; letter-spacing: .17em; color: var(--muted); margin-top: 2px; }
.patch-identity { display: flex; align-items: center; gap: 10px; }
.patch-identity label, .connection-bar label { font-size: 10px; font-weight: 800; letter-spacing: .14em; color: var(--muted); }
.patch-identity input { width: 190px; padding: 9px 12px; color: var(--ink); border: 1px solid var(--line); background: var(--field); font-family: "SFMono-Regular", Consolas, monospace; letter-spacing: .12em; text-transform: uppercase; }
.top-actions { justify-self: end; display: flex; gap: 8px; }
.button { border: 1px solid var(--ink); padding: 9px 13px; font-size: 11px; font-weight: 750; letter-spacing: .04em; background: transparent; }
.button.dark { background: var(--ink); color: white; }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(0); }

.connection-bar { min-height: 46px; padding: 7px 28px; display: flex; align-items: center; gap: 20px; background: var(--rail); border-bottom: 1px solid var(--rail-line); }
.connection-bar label { display: flex; align-items: center; gap: 7px; color: #565750; }
.connection-bar select { min-width: 148px; max-width: 220px; border: 0; border-bottom: 1px solid #aaa69c; padding: 4px 24px 4px 4px; background: transparent; font-size: 12px; }
.connection-state { min-width: 164px; display: flex; align-items: center; gap: 8px; font-size: 11px; font-weight: 700; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #a09f99; box-shadow: 0 0 0 3px rgba(0,0,0,.04); }
.status-dot.live { background: #69a84f; box-shadow: 0 0 0 3px rgba(105,168,79,.18); }
.text-button { border: 0; padding: 3px 0; border-bottom: 1px solid currentColor; background: transparent; font-size: 11px; font-weight: 750; }
.text-button:disabled { opacity: .38; cursor: default; }
.bar-spacer { flex: 1; }
.channel-label select { min-width: 48px; }

main { max-width: 1600px; margin: 0 auto; padding: 26px 28px 40px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 1fr .82fr; gap: 14px; }
.panel { background: var(--panel); border: 1px solid var(--line); padding: 20px; box-shadow: 0 1px 0 rgba(255,255,255,.6) inset; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 14px; }
.section-heading.compact { margin-bottom: 18px; }
.eyebrow { display: block; margin-bottom: 4px; color: var(--muted); font-size: 9px; font-weight: 850; letter-spacing: .17em; }
h1, h2 { margin: 0; font-size: 20px; line-height: 1; letter-spacing: -.035em; }
h1 strong { color: var(--accent); font-family: "SFMono-Regular", Consolas, monospace; }
.stepper { display: flex; }
.stepper button { width: 32px; height: 29px; border: 1px solid var(--line); background: transparent; font-size: 18px; }
.stepper button + button { border-left: 0; }
.algorithm-visual { height: 162px; display: grid; place-items: center; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background-color: var(--canvas); background-image: radial-gradient(var(--canvas-grid) .7px, transparent .7px); background-size: 12px 12px; }
.algorithm-visual svg { width: 100%; height: 100%; overflow: visible; }
.algorithm-slider { width: 100%; margin: 17px 0 0; accent-color: var(--accent); }
.range-labels { display: flex; justify-content: space-between; color: var(--muted); font: 9px "SFMono-Regular", Consolas, monospace; }

.control-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 17px 20px; }
.control { min-width: 0; }
.control-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 8px; }
.control-head label { font-size: 10px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.control-value { color: var(--accent); font: 11px "SFMono-Regular", Consolas, monospace; }
.control input[type="range"] { display: block; width: 100%; height: 3px; margin: 4px 0; accent-color: var(--ink); }
.control select { width: 100%; border: 0; border-bottom: 1px solid var(--line); padding: 6px 2px; background: transparent; font-size: 11px; font-weight: 700; }
.effects-grid { display: grid; gap: 17px; }
.effect-block { border-left: 3px solid var(--yellow); padding-left: 12px; }
.effect-block:nth-child(2) { border-color: var(--violet); }
.effect-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.effect-title b { font-size: 10px; letter-spacing: .15em; }

.operators-section { margin-top: 28px; }
.operators-header { display: flex; justify-content: space-between; align-items: end; margin-bottom: 13px; }
.operators-header h2 { font-size: 26px; }
.operators-actions { display: flex; gap: 8px; }
.operators-grid { display: grid; grid-template-columns: repeat(4, minmax(225px, 1fr)); gap: 12px; }
.operator { --op: var(--green); background: var(--panel); border: 1px solid var(--line); border-top: 5px solid var(--op); min-width: 0; }
.operator:nth-child(2) { --op: var(--blue); }
.operator:nth-child(3) { --op: var(--yellow); }
.operator:nth-child(4) { --op: var(--violet); }
.operator-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--line); }
.operator-title { display: flex; align-items: center; gap: 9px; }
.operator-number { width: 27px; height: 27px; display: grid; place-items: center; background: var(--op); color: #111; font-weight: 900; }
.operator-title strong { font-size: 12px; letter-spacing: .1em; }
.toggle { position: relative; width: 34px; height: 18px; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle span { position: absolute; inset: 0; border: 1px solid #aaa89f; background: #d8d5cd; }
.toggle span::after { content: ""; position: absolute; width: 12px; height: 12px; left: 2px; top: 2px; background: var(--field); transition: .15s; }
.toggle input:checked + span { background: var(--op); border-color: var(--op); }
.toggle input:checked + span::after { transform: translateX(16px); }
.operator-body { padding: 14px 16px 17px; }
.operator .control-grid { gap: 14px 14px; }
.operator .control-wide { grid-column: span 2; }
.operator-section-title { margin: 17px 0 10px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 9px; color: var(--muted); font-weight: 850; letter-spacing: .15em; }
.mini-envelope { width: 100%; height: 72px; margin-bottom: 10px; background: var(--canvas); }

.lower-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 14px; margin-top: 14px; }
#pitch-envelope { display: block; width: 100%; height: 145px; background: var(--canvas); }
.envelope-controls { display: grid; grid-template-columns: repeat(8, 1fr); gap: 8px; margin-top: 13px; }
.envelope-controls .control-head label { font-size: 8px; }
.keyboard { height: 134px; position: relative; display: flex; user-select: none; overflow: hidden; border: 1px solid var(--ink); }
.key.white { flex: 1; height: 100%; background: var(--field); border-right: 1px solid #777a75; position: relative; }
.key.white:last-child { border-right: 0; }
.key.black { position: absolute; top: 0; width: 7.2%; height: 62%; z-index: 2; background: #222; border: 1px solid #000; transform: translateX(-50%); }
.key.active { background: var(--accent); }
.key span { position: absolute; bottom: 7px; left: 50%; transform: translateX(-50%); font-size: 8px; color: var(--muted); }
.keyboard-hint { margin: 10px 0 0; color: var(--muted); font-size: 10px; }
.velocity-control { display: flex; align-items: center; gap: 7px; font-size: 9px; font-weight: 800; }
.velocity-control input { width: 74px; accent-color: var(--accent); }

footer { min-height: 54px; border-top: 1px solid var(--line); padding: 0 28px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; color: var(--muted); font-size: 9px; letter-spacing: .1em; }
footer span:nth-child(2) { letter-spacing: .03em; }
footer a { justify-self: end; color: inherit; }
.toast { position: fixed; right: 22px; bottom: 22px; z-index: 30; padding: 12px 16px; color: white; background: #222; font-size: 11px; transform: translateY(20px); opacity: 0; pointer-events: none; transition: .2s; }
.toast.show { transform: translateY(0); opacity: 1; }

.debug-dialog { width: min(920px, calc(100vw - 32px)); height: min(680px, calc(100vh - 32px)); padding: 0; color: var(--ink); background: var(--panel); border: 1px solid var(--ink); box-shadow: 0 24px 80px rgba(0,0,0,.28); }
.debug-dialog::backdrop { background: rgba(20,21,20,.52); backdrop-filter: blur(3px); }
.debug-header { height: 72px; padding: 0 20px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.debug-header h2 { font-size: 21px; }
.debug-close { width: 34px; height: 34px; border: 1px solid var(--line); background: transparent; font-size: 24px; line-height: 1; }
.debug-summary { display: grid; grid-template-columns: 1fr 1fr .55fr; border-bottom: 1px solid var(--line); }
.debug-summary > div { min-width: 0; padding: 14px 20px; border-right: 1px solid var(--line); }
.debug-summary > div:last-child { border-right: 0; }
.debug-summary span, .debug-summary strong { display: block; }
.debug-summary span { margin-bottom: 5px; color: var(--muted); font-size: 8px; font-weight: 850; letter-spacing: .15em; }
.debug-summary strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 11px "SFMono-Regular", Consolas, monospace; }
#debug-rx { color: #397f48; } #debug-tx { color: #bd4b25; } #debug-rt { color: #77766f; }
.debug-toolbar { min-height: 45px; padding: 8px 14px 8px 20px; display: flex; align-items: center; justify-content: space-between; gap: 12px; background: var(--rail); border-bottom: 1px solid var(--line); color: var(--muted); font-size: 9px; }
.debug-toolbar button { margin-left: 6px; padding: 5px 9px; border: 1px solid #aaa69c; background: transparent; font-size: 9px; font-weight: 750; }
.debug-log { height: calc(100% - 232px); margin: 0; padding: 16px 20px; overflow: auto; background: var(--debug-bg); color: var(--debug-text); font: 11px/1.65 "SFMono-Regular", Consolas, monospace; white-space: pre-wrap; word-break: break-all; }

:root[data-theme="dark"] .brand-mark { color: #151715; background: #f1f0ea; }
:root[data-theme="dark"] .button.dark { color: #151715; background: #f1f0ea; border-color: #f1f0ea; }
:root[data-theme="dark"] .connection-bar label { color: #b2b4ad; }
:root[data-theme="dark"] .connection-bar select { color: var(--ink); border-color: #555a55; }
:root[data-theme="dark"] .panel { box-shadow: 0 1px 0 rgba(255,255,255,.025) inset; }
:root[data-theme="dark"] .key.black { background: #050606; }
:root[data-theme="dark"] .debug-dialog::backdrop { background: rgba(0,0,0,.72); }
.debug-help { min-height: 58px; margin: 0; padding: 12px 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; line-height: 1.5; }

@media (max-width: 720px) {
  .debug-summary { grid-template-columns: 1fr; }
  .debug-summary > div { padding: 9px 14px; border-right: 0; border-bottom: 1px solid var(--line); }
  .debug-log { height: calc(100% - 300px); }
  .debug-toolbar > span { display: none; }
  .debug-toolbar { justify-content: flex-end; }
}

@media (max-width: 1120px) {
  .hero-grid { grid-template-columns: 1fr 1fr; }
  .effects-panel { grid-column: span 2; }
  .effects-grid { grid-template-columns: 1fr 1fr; }
  .operators-grid { grid-template-columns: repeat(2, 1fr); }
  .lower-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .topbar { height: auto; padding: 14px 16px; grid-template-columns: 1fr auto; gap: 12px; }
  .patch-identity { grid-row: 2; grid-column: 1 / -1; }
  .patch-identity input { flex: 1; }
  .top-actions .quiet { display: none; }
  .connection-bar { padding: 10px 16px; flex-wrap: wrap; gap: 10px 14px; }
  .connection-state { width: 100%; }
  .connection-bar label { flex: 1; }
  .connection-bar select { min-width: 0; width: 100%; }
  .bar-spacer { display: none; }
  main { padding: 18px 14px 30px; }
  .hero-grid, .operators-grid { grid-template-columns: 1fr; }
  .effects-panel { grid-column: auto; }
  .effects-grid { grid-template-columns: 1fr; }
  .envelope-controls { grid-template-columns: repeat(4, 1fr); }
  footer { padding: 12px 16px; grid-template-columns: 1fr; gap: 6px; }
  footer a { justify-self: start; }
}